The Double Walled Rubber Finish Flask is ideal for winter days out and everyday use. Holds up to 1 litre and is insulated to help maintain the temperature of your liquids, while the double wall prevents the outside of the flask getting too hot. Capacity - this flask has a capacity of 1 litreDouble Walled - insulated to maintain liquid temperature without transferring heat to the outer wall. Leakproof Lid - watertight seal lid with push button release for easy pouring